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Chest XRay Interstitial Pattern - Differential Algorithm #Diagnosis #Radiology #Pulmonary #CXR #Interstitial #Pattern #Differential #Algorithm #RadiologyAssistant
Chest XRay Interstitial ... Pattern - Differential ... Diagnosis #Radiology #Pulmonary ... #CXR #Interstitial ... #Algorithm #RadiologyAssistant
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
lung disease (i.e ... Diagnosis #Radiology #Pulmonary ... #CTChest #GGO # ... #GroundGlass #Differential ... #RadiologyAssistant
Interstitial Lung Diseases (ILD)
Exposure-Related ILD (a.k.a. extrinsic allergic alveolitis): 
 • Hypersensitivity pneumonitis, Farmer's lung, Bird
Interstitial Lung ... • Idiopathic pulmonary ... pneumonia (COP), Respiratory ... ILD #diagnosis #differential ... #pulmonary #causes
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
Upper lung zone ... centrilobular emphysema - Respiratory ... - Aspiration - Pulmonary ... HRCT #ChestCT #Differential ... #Upper #Lower #RadiologyAssistant
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis ... lung disease comes ... lung disease and ... Diagnosis #Radiology #Pulmonary ... #RadiologyAssistant
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
Hypoventilation: CNS of Respiratory ... Disease, Interstitial ... Fibrosis, Interstitial ... Lung Disease ... Hypoxia #hypoxemia #differential
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
- Emphysema - Lung ... Diagnosis #Radiology #Pulmonary ... #CTChest #LowAttenuation ... #Differential # ... Emphysema #SignetRing #RadiologyAssistant
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
The idiopathic interstitial ... responses of the lung ... Diagnosis #Radiology #Pulmonary ... #CTChest #Idiopathic ... ILD #Findings #RadiologyAssistant
Hypoxemic Respiratory Failure - Differential Diagnosis Framework
DECREASED INSPIRED OXYGEN
 • Low PATM Can decrease first part
Failure - Differential ... oxygen • Causes: Interstitial ... lung diseases, ... bypassing the lungs ... Failure #hypoxia #Differential
Causes of Hypoxemia- Differential Diagnosis Algorithm
Ventilation/perfusion Mismatch
 • Airway Disease (Asthma, COPD)
 • Vascular (PE*)
 •
of Hypoxemia- Differential ... Limitation • Interstitial ... lung disease ... Abnormalities • Chest ... Hypoxemia #Hypoxia #Differential